ID | 54036 |
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Author |
Yoshimoto, Kaori
Motose, Hiroyasu
Department of Biological Science, Graduate School of Natural Science and Technology, Okayama University
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Abstract | The xylem conducts water and minerals from the root to the shoot and provides mechanical strength to the plant body. The vascular precursor cells of the procambium differentiate to form continuous vascular strands, from which xylem and phloem cells are generated in the proper spatiotemporal pattern. Procambium formation and xylem differentiation are directed by auxin. In angiosperms, thermospermine, a structural isomer of spermine, suppresses xylem differentiation by limiting auxin signalling. However, the process of auxin-inducible xylem differentiation has not been fully elucidated and remains difficult to manipulate. Here, we found that an antagonist of spermidine can act as an inhibitor of thermospermine biosynthesis and results in excessive xylem differentiation, which is a phenocopy of a thermospermine-deficient mutant acaulis5 in Arabidopsis thaliana. We named this compound xylemin owing to its xylem-inducing effect. Application of a combination of xylemin and thermospermine to wild-type seedlings negates the effect of xylemin, whereas co-treatment with xylemin and a synthetic proauxin, which undergoes hydrolysis to release active auxin, has a synergistic inductive effect on xylem differentiation. Thus, xylemin may serve as a useful transformative chemical tool not only for the study of thermospermine function in various plant species but also for the control of xylem induction and woody biomass production.
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Note | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit ttp://creativecommons.org/licenses/by/4.0/
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Published Date | 2016-02-16
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Publication Title |
Scientific Reports
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Volume | volume6
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Publisher | Macmillan Publishers Limited.
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Start Page | 21487
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ISSN | 2045-2322
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Content Type |
Journal Article
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Official Url | http\://www.nature.com/srep/
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language |
English
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Copyright Holders | © 2016 authors
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File Version | publisher
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Refereed |
True
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